Long time ago I learned that a database is any kind of structured, machine readable data. A database management system is the software that manages these databa

Long time ago I learned that a database is any kind of structured, machine readable data. A database management system is the software that manages these databases and databases + database management system = database system. Dunno if recalled correctly. Directly afterwards I got told that no one ever uses these words correctly, but the professor felt obliged to at least tell us the academic definition once. Since this was a German lecture, some time was spent on the correct plural of schema (german: Schema). The options presented were Schema, Schemas, Schemata and everything was allowed as long as it is not Schemen (multiple shadowy figures). Dunno why I remember this. It's the only part of the lecture I really remember.